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Amy has a question for Sheldon as Penny watches on from the couch.
The Hot Tub Contamination
Season 10, Episode 5 - Aired October 17, 2016
When Sheldon and Amy start bickering over their living situation, Leonard and Penny step in to keep the pair separate and to give them advice on living with a significant other. Meanwhile, after Howard and Bernadette blow off a planned vacation, they observe a pair of unexpected guests in their hot tub.